We also are looking to make the plunge into our 1st motorhome after having TT'ed for years.
Went to Hershey and looked at numerous motorhomes. Below are our conclusions.
Class C is easier to get into given the 2 front doors, is on the cutaway van chassis so maintenance is as simple as maintaining a E450/4500 van, some models of 31' are almost as large as a similar 31' A. Cost of new will be $10-20K less than an entry level A. Take a look at the Sunseeker 3010DS for example. It has fiberglass roof, composite sides, and airbags items normally associated with higher end A's.
Class A is bigger, period, than a similar C. If money is no object, then you can get a real monster 40', diesel. The only real comparison would be something like a Super C Seneca. An entry level 30 foot (ACE, Precept,FR3) or so would be as stated above $10-20K more than a C. Since it is likely an A will be on either an F53 or Freightliner chassis, it will take some looking for folks willing to perform maintenance. Finally, if a King bed is important, A is really the only choice.
Whew. Not easy when you are talking an investment of $70K+!! So many choices!
Unless we hit the lottery, our selection will likely be a 3010DS like described above. Check out RV Direct for prices of various models. They seem to offer 30% off MSRP no questions asked.